Lightning-arrester.



PATENTED MAR. 24, 1908.

' w. T. GODDARD. LIGHTNING ARRESTBR. APPLIOATION FILED AUG. 7, 1905- 1m Jaye-meme in Lightning A.

Apparatus time :1

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@hereef; and, Fig. 3 iea sectional View of the memiting for the operating magnet.

In the practical construction of my device, upon the upper end of an insuleting base 1,

.1-- i'neula'tizxg material, is mounted acket 2, having a binding post 3, to which fine Wire may be connected and movided "mm a c'iisehmge paint preferabfy in the cm (21% e me i cylinder having a. semiglee and and suitably secured and supflied in the bracket by means ef the set screw 3*. Beneath 1s discharge paint is ived a resistance and 5, having secured (5 :1. ppm thereof a discharge point 6, "a aiso prefembliy formed metal and e; eezni-epherieai end. The discharge '3 6 and 4 have a slight air gap between we, shown in the drawing. The I-e red 5 may "wake any suitable form, refer so construe?) the same in the e lri'iz rod end inerder to ebtein .e 1 surface distance on the base be- 2 current carrying parts 0f the arh r st en the bese 511.}{1 are liable v in potentl, A I have provided we he lower and of the rea smali pisxte having e11 outing Eng 7, to wide is at- 0'? a screw the inner end )erting band 9, which eur- Lsmnce red. The extreme i tenee rod also eupband 11, which is con- 21. 15 3)?" P 12, 0f

e projecp'rovld I I 1 s etteelxeaz the Lexibie *pese which will mere 'iufiy 3 :peerhere hue providing e euv'peirt e1 meun i h the resistane :3 5, at Hue lower am? thereuf I 22111 enabled L ,fl. .wport for the resistance rod the greatest 'possiifle iistanee from the Market Act a min upon he base, near the iewer end of t he resistance rod 5, and to one side ihezee-f, mounted a support 16, in which is m'ed the fiber tube 17 This support 0011- ef a head l'mving 2L socket 18 formed 1 which is-prefembly formed of slate or othep min, in Whisk is fitted the upper end f I the fiberz tube 17. The upper end of the socket is preferably madewider, as at 19, and an annular wedge 20 on the inside of the tube 17, tends to spread the upper end thereof to hold the same securely in position. and

prevent the tube from dropping. A magnet coil 21 carried upon and surrounds the tube 17, and is adapted to actuate a core 22 located within the tube and capable of mov ing longitudinally therein. The core 22 carries a rod 23 extending from its upper end and out at the top of the tube, and through the support 16, being connected with the end of. the conductor 15. This rod is preferably U1 brass, although other material may be used.

A discharge point 24, preferably formed of metal and having a semi-spherical end, is adapted to fit within the lower end of the fiber tube, and is secured in position therein by means of a pin 25, passing tllOX'GtlllIUUgll and through the tube. Mounted upon the upper end of the discharge point 24, within the tube 17, is a carbon button 26, Immediately beneath the discharge )oint 24 is mounted a bracket- 27, similar to the bracket 2, having a binding post 28, whereby the samemay be connected with the ground. conductor, and carrying the discharge point 29, which is secured in position in the bracket by the set screw so. The discharge point 24 and discharge point 29 are separated from each other by a small air gap, shown in the drawing.

One terminal of the coil 21 is connected by a conductor 31, with the lug 7, and the opposite terminal of the coil is connected by conductor 32, with the projection 12, whereby the coil is connected in shunt of the lower portion 34 of the resistance rod 6: It will be seen that with the devices and circuit connections shown, a current has two paths to earth, namely, through the entire resistance 5, solenoid core directly to the part 24 and also through a portion of the resistance 5 through the solenoid and through the solenoid core to the part 24.

In operation, a lightnin or similar discharge on the line wire wil seek the path from the bracket 2; across the air ,gap between the discharge points 4 and 6, and, because of the impedance of the solenoid wind-- ing 21, will not divide at the supporting band 9, but will pass throughthe resistance rod 5, by the conductor 15, through the core'22,

thence jumping across the air gap to elec- E trode 29, and thence to the ground. As soon as the arc is established across'the spark gap,

a comparatively low resistance path for the line current is fumished and it at once follows the path in a large volume and being continuous in character, will divide by reason of the resistance between the connections 9 and 11 and a portion thereof will pass 'said first mentioned discharge through the magnet 21 by way of conductors 31 and 32. The magnet or solenoid will become energized, drawing up its core and lifting the same from contact with the carbou button 26, thus opening the circuit and stop-' ping the flow of currentin the branch from the line through the instrun'ient to tilt ground. the arc between'thc electrodes 24 an ceases, so that upon the falling of the core,

as soon as the magnet is dencr ized, thecitcuit will again be open at the electrodes and the instrument in position to act in the some way upon the occurrence of another diocharge.

it will be noted with particular reference to my invention that the danger of short circuits due to dust or moisture or both combined on the surface of the base is lessened by mounting the different parts as above described to obtain a large increase of surface distance between the (nirre t-carryi parts. resting on the base, between which t late is likely to exist a great'diiference of potentiol and by reference to the drawings it will be seen that this surface distance is from the lower edge of the bracket 2 to the u per ed of the band 9, and from the lower edge of ti: band 1 1 to the upper edge of the bracket 27.

The flow of current being StQPJDOgg, A

While I have escribcd one form of my vcntion, it will be understood that various modifications may be made without departforth in the appended claims.

Having thus described my invention what ing from the spirit of the invention as not with a suitable insulatin base, of binding posts near the ends of suit base, an operating magnet, a tube of insulating material carrying said ma 'nctand havin arranged within the some t to core of and magnet, and a single supporting means for said tube near it! upper end upon the base.

2. In a lightning arrester, the combination with an insulating base, of an operating magnet, an insulating tube carrying said magnet and having the core of said magnet arm ed within the same, a discharge point card at one end of said tube, a discharge oint connected with the ground mounte beneath single supporting means for t e tube orranged upon said base at the end of the tube ing means arranged near the other end of said resistance farthest awn from the binding post for supporting-sci resistance upon )int, and a the base, sothat a large surface distance is interposed on said base between said lupporting means and said binding post.

with an insulating 4. In a lightningarrester, the combination with an insn'latii base, of a discharge point said base, a resistance, a second discharge point mounted at one end of said resistance Q cooperating with said first mentioned 'dischar epoint, and a low resistance supportin mern 1' arran ed near the other end of said resistance fart est away from the (llSCl'lfiJ'ge point connected with the line, so that a large surface distance is interposed between said low resistance member and said discharge i point connected with the line.

5.. In a lightning arrester, the combination base, of a discharge point carried thereby a apted to be connected with the line, of a resistance, a discharge oint cooperating with said first mentioned :Fischarge point and carried by one end of said resistance, and single means positioned near the other end of said resistance for supporting said resistance upon said base.

6. In a lightning arrester, the combination with an insulating base, of adischarge int can'iedi thereby, a resistance, a disc arge point cooperating with said first mentioned discharge point and carried at one end of said connected with-t e line and mounted upon resistance, asingle supporting means for said resistance near its opposite end, an operatin r magnet, an insulating tube carrying sai magnet, and having arranged therein the core of the magnet, and means for supporting said tube near its upper end 7. In a lightning arrester, the combination with an operatingmagnet, of an insulating tube supporting the same and carrying at one end a discharge oint, a resistance having one end thereof adjacent one end of said tube, a discharge point carried .u on the op posit-eend of said resistance, ant means for supporting respectively, at their adjacent ends said resistance and said tube.

In witness whereof, I have hereunto subscribed my name in the presence of two wit-- nesses.

wALT R T. GooDARn. Witnesses:

N.'M. Nrnnnms, JOHN S LAPP. I 

